Posted on March 26, 2010.
Astigmatism Toric contact lenses corrective Today, Toric contact lenses are available in almost all types of lenses, like the soft, disposable, frequent replacement, multifocal and color types.
Toric contact lenses are similar to bifocals, focal points, which have two different powers resulting from different curvatures. While toric lenses can correct both astigmatism and myopia or hyperopia. The difference between the toric and spherical lenses is that they can not turn on or blinks his eyes in looking around. Toric lenses can be soft and PRSG and require more time and skill so that their prices are inevitably higher.
If you only have a slight astigmatism between zero and 1.00 diopter, toric lenses is not a necessity. The rigidity of the common rigid gas permeable lenses offer a spherical shape comfortable for your cornea reduces the need for correction of astigmatism. ECPs can also use high-power spherical soft contact lenses to achieve the same effect. Two of these ways require testing. A third type of lenses that reduce spherical aberration of the eye can also "correct" without astigmatism need toric lenses.
As mentioned above, toric lenses can be soft and PRSG. Most people overlook the performance of maintenance as rigid gas permeable lenses and toric soft lenses choose more at ease, even if PRSG provide a clearer view.
The options range lenses colored toric lenses, toric and multifocal toric lenses brand, your CPE is the judge according to your eye conditions. Although ring color (in both value and type of change) lenses are available in both disposable and non-disposable types, multifocal toric lenses are mostly non-disposable and PRSG characters.
Toric contact lenses are offered by many brands of silicone hydrogel lenses, including the type available monthly and quarterly replacement lenses special requirement. Customers still need to choose which offer ECPs toric lenses fitting for your well-being his personal vision.
Article Source: http://vision.firmoo.com/contact-lenses/astigmatism-corrective-toric-contact-lenses.html